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A116715
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Number of permutations of length n which avoid the patterns 312, 2341, 4321.
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1
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1, 2, 5, 12, 25, 54, 120, 265, 580, 1272, 2796, 6143, 13488, 29619, 65053, 142873, 313771, 689095, 1513390, 3323699, 7299465, 16031000, 35207128, 77321545, 169812767, 372941033, 819049274, 1798787604, 3950478790, 8676000808
(list; graph; refs; listen; history; internal format)
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